采用原位透射式傅立叶变换红外光谱(FT-IR)技术在线研究了UF4/KBr在空气中室温条件下的水解反应及其热转化行为,获取反应前后不同铀化合物的红外光谱变化图。结果表明,UF4/KBr在空气中的水解反应,首先主要生成的是UO2F2和/或UO2Br2及其水合物形式;随着时间增长,还伴生有U3O8、UO2、UO3等多种铀化合物;加热过程中,UF4/KBr的水解产物发生相互转化反应,其中的铀酰化合物最后全部转变为铀的氧化物形式。 In situ Fourier Transform Infrared Spectroscopy (FT-IR) was used to study the hydrolysis reaction and thermal conversion behavior of UF4 / KBr in air at room temperature. The infrared spectra of different uranium compounds were obtained before and after the reaction. The results show that the UF4 / KBr in the air is the main form of UO2F2 and / or UO2Br2 and its hydrate form; with the growth of time, a variety of uranium compounds such as U3O8, UO2, UO3 and so on; the heating process In the UF4 / KBr hydrolysates undergo a mutual conversion reaction, in which the uranyl compounds are finally all converted to uranium oxide forms.